How to Identify the Quality of Tires?

[OEloise]

Tire quality can be identified from aspects such as the tread pattern, color, hardness on both sides, the joint between the tread and sidewall, elasticity, and brand. Below is a related introduction to car tires: 1. The impact of tire size on a car: The size of the tire affects the car's acceleration, smoothness, and fuel consumption. The relationship between tire size and driving speed is complex. Small-displacement cars may struggle to move if fitted with oversized tires due to insufficient power, while large-displacement cars may have their power output limited by too-small tires, affecting speed. Bigger and wider tires are not always better. On bumpy or rough roads, or when going over speed bumps, tires can easily rub against the wheel arches. 2. The function of tires: Tires transmit driving force, braking force, and steering force to achieve car operation; they support the vehicle load; and they reduce and absorb vibrations and impact forces during driving, preventing severe vibrations from damaging car components.

[SanIsaac]

The method I use most often is checking the tread depth on the tires. Each tire has small 1.6mm high raised wear indicators in the tread grooves - when the tread wears down to this level, the tires must be replaced immediately. If you feel exposed metal wires by running your hand along the tire edge, that's absolutely unacceptable. New tires usually have small triangle markers on the sidewall indicating the tread wear indicator positions. When parking, always inspect tire sidewalls for bulges or cuts - these can cause sudden blowouts. Remember to regularly insert a coin into the tread grooves; if the tread covers the national emblem pattern (about 3mm depth to the coin's edge), replace the tires promptly.

[SanJosephine]

When choosing tires, focus on three key aspects. First, the production date: The last four digits of the DOT number on the tire sidewall, such as 1122, indicate the 11th week of 2022. Avoid tires older than three years as the rubber deteriorates. Second, check for fine cracks on the tire sidewall, especially on vehicles often parked outdoors. Sun and rain can cause the rubber to crack, resembling wrinkles on aged skin—such tires are unsuitable. Third, ensure the tire brand markings are clear. Retreaded tires often have their brands sanded off and reprinted, resulting in uneven imprints upon close inspection. Additionally, the inner side of the tire is crucial. Consider lifting the vehicle to inspect the inner side for any damage.

[DiAubree]

You can actually judge the quality of tires by listening with your ears. When driving at around 80 km/h with the windows closed, listen for any periodic humming sounds, which usually indicate uneven tire wear. Pay attention to the sound when going over speed bumps – a normal tire will produce a crisp 'thump,' while a 'popping' sound might mean the steel wires in the tire sidewall are broken. If you hear a rattling noise when turning the steering wheel to full lock, it could be due to a bulging or deformed tire. If a tire is out of round, the faster you drive, the more the car body will shake. For those who have the means, regularly using a tire pressure gauge is advisable. If the pressure difference between the four tires exceeds 0.3 kg, it suggests that one of the tires is starting to deform.

[StephenLynn]

Here are a few practical tips from fellow car owners. After driving in the rain, check the water marks on the tire tread. A normal tire should leave even and continuous water traces. If the marks appear broken or intermittent, it indicates tread deformation. Gently scratch the tread with a key—good rubber is elastic and won’t easily shed particles. Observe the tire’s contact patch: a healthy one resembles a plump oval, while an overly worn tire will leave a flatter imprint. If you notice fine, nail-like marks on the tire sidewall, stop using it—those signal internal steel belt fractures. Remember, tires have an expiration date. Even with deep treads, rubber older than six years hardens like cardboard, becoming dangerously unreliable during emergency braking.

[SanSavannah]

As a car enthusiast, sharing some comprehensive judgment experience. Besides wear indicators, good tires have a smooth transition between the tread crown and shoulder, while inferior tires may have sharp edges here. Ensure the production week number is no older than two and a half years—the DOT number's 9th to 12th digits indicate the production week. Inspect the tire shape from the side; any bulges or dents mean immediate disposal. During a wheel alignment at a repair shop, ask them to check if the tire roundness error exceeds 1.5mm—this warrants attention. Lastly, pay attention to the tire speed rating symbol, e.g., 'V' in 94V stands for a maximum of 240km/h. Lowering the speed rating during tire replacement can affect high-speed stability.